Bevel



(No Model.)

D-.A.:GLARKE'.

' BEVBL.

No. 268,188. Patented Nov. 28. 1882.

PATENT FFECE.

DONALD A. CLARKE, or SEDALIA, MIssoum.

BEVE L.

SPECIFICATION forming part of Letters Patent No. 268,188, dated November 28, 1882.

' Application filed September 19, 1882. (No model.)

To all whom it may concern:

Be it known that I, DONALD A. CLARKE,-a citizen of the United States of America, residing at Sedalia, in the county ofPettis and State of Missouri, have invented certain new and useful Improvements in Bevels or Gonformators; and Ido hereby declarethefollowing to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference beinghad to the accompanying drawin gs, and to letters or figures of reference marked th ereon,which form a part of this specification.

My invention relates to an instrument designed to facilitate, laying oft angular work wherein the same involves fitting parts to each other on angular lines, as in the carpentry and cabinet trades,while the use ofsaid instrument is more especially designed in this case to facilitate the fitting 0t carpets and borders forthe same and other flooring materials; and my invention consists in certain features hereinafter described, and specifically set forth in the claims.

Referring to the drawings, Figure 1 is a plan 5 Figs. 2 and 3, details of a bevel or coni'orniator constructed in accordance with my invention, and Fig. 4 an illustration of the manner of using the same.

Like letters refer to likeparts in all the figures.

A represents the central strip of the instrument, which is slotted at a, which slot extends from or nearly from one end to the other thereof, as shown. To add strength, the ends a c ot the strip are slitted transversely, and a metal plate, a, is inserted and secured in the slit by rivets, the edges of the said plate being flush with the edges and ends of the strip.

Four arms, B O D E, are pivotally connected to each other and to the central strip in the following order: B and E to each other at b and O and D to each other at d by an ordinary rivet and washer; B and (J to each other and to the central strip and D and E to the same and within the slot (1 thereof by screw-threaded pivotsf.

G represents a binding-plate, having flanges g and aoentral longitudinal bar orlug,g; and

formed on or in or rigidly secured to said bar is the pivot J. On the lower surface of the binding-plate is a pin, f which may be a pointed end of the pivot, or a separate piece of suitable material.

A nut, F, and washer f complete the list of separate parts of the instrument.

As thus far described the arms consist of single strips; but, if desired, two or more of them may each comprise two strips, as shown in Fig. 2, where the arm B comprises two strips, 1) b, and the arm 0 is interposed therein between ,wliich arrangement contemplatesan arm, D, composed of two strips, and an arm, E, of a singlestrip, such construction being common in similar devices, and therefore not requiring further description.

It will be seen that when the parts are assembled the flanges g of thebinding-plate will embrace the edges of the strip A, the bar will fit the slot a thereof, and the pivot-f will project above the arms, and by means of the nut and washer these may be bound tightly at any point on the central strip, and yet be adapted to move about the pivot as a center. This adjustability of either pair of arms at either end of the strip results in an advantageous use or application of the conformator, which isimpossible when either pair of arms are rigidly pivoted at one end of the strip, as heretofore.

In operation and use, an end, c of the central strip being placed at the point of intersection as, Fig. 4, of surfaces 3 2, arranged at any angle to each other, the arms B G are moved against said surfaces by loosening the nut E, which binds the arms D E in the slot (1, and moving the ends of said arms toward the said end of the strip. The nut F is now tightened, and by placing the instrument upon, for instance, oil-cloth, with the pin f at a corner and the slot over a line equally dividing the angle at said corner, a line drawn upon the oil-cloth at the outer edges of the arms B U will indicate where it should be out to fit'the door in a corner formed by walls arranged as at my 2 in the illustration at Fig. 4. In this manner anyinterior angle may be laid ofi by the instrument up to that convergence which will require such a spread of the ends I) d of the arms B G as to bring the arms D E in a straight line, and in the usual construction of instrumentsthis occurs when the arms B O are at a right angle to each other. To enable me to take interior angles greater than fortyfive degrees I increase the length of the arms 1) E. But even with this change there is a point of advantage not provided for--namely, that of taking exterior angles when the arms E D are shorter than the arms "B G. This 1 accomplish by the use of adjustable sliding pivots at both ends of the central strip.

Referring to the left of Fig. 4:, it will be seen that the arms D E are pivoted at the end a of the central strip, and are placed against the surfaces .70 y z, secured in place and applied to the material as in the previous case. It will readily be seen that without means for using either end of the strip A at the point of intersectiomboth exterior and interior angles could not be taken.

Any or all of the arms and the strip may be provided with scales of degrees or lineal measurement, as shown, whereby the instrument can be set primarily to desired angles. 7

Having described my invention and its operation, what I claim as new, and desire to secure by Letters Patent, is-

l. The combination of the central strip, A, slotted at a and having solid ends, the longer arms B G, adjustably pivoted at one end in said slot a, and the shorter arms D E, adjustably pivoted at the other end in said slot, said arms being pivotally connected at I) (Z, substantially as shown and described.

2. In a bevel or conformator, the bindingplate G, provided with the flanges g g, bar 9, pointf and rigid threaded pivot f, substantially as shown and described.

3. The combination of the arms B O, slotted strip A, plate G, having bar g and rigid pivot f, and the nut F, substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

DONALD A. CLARKE.

Witnesses J. W. BURRESS, R. H. Moses. 

